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Патент USA US3024752

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March 13, 1962
3,024,742
E. H. BLATTNER
RAILWAY TRUCK SNUBBER
Filed March 22, 1957
3 Sheets-Sheet 1
H
5
FIG.3
FIG.1
FIG.2
lnventorf
Emil H. Blattner
By
March 13, 1962
E. H. BLATTNER
3,024,742
RAILWAY TRUCK SNUBBER
Filed March 22, 1957
3 Sheets-Sheet 2
Inventor:
Emil H. Blattner
By
his Attorney
March 13, 1962
E. H. BLATTNER
3,024,742
RAILWAY TRUCK SNUBBER
Filed March 22,
1957
v
‘
s Sheets-Sheet 3
////z.//// “
Q
FIG.7
FIG.8
f
Inventor:
Emil H. Bluttner
By
his Attorney
United States Patent O?lice
3,024,742
Patented Mar. 13, 1962
1
2
3,024,742
appear hereinafter in the detailed description, be particu
larly pointed out in the appended claims and be illus
trated in the accompanying drawings, in which:
RAILWAY TRUCK SNUBBER
Emil H. Blattner, Williamsville, N.Y., assignor to Syming
ton Wayne Corporation, a corporation of Maryland
Filed Mar. 22, 1957. Ser. No. 647,829
11 Claims. (Cl. 105-193)
FIGURE 1 is a somewhat schematic side elevational
view of a locomotive traction truck to which have been
applied a pair of the snubbers of the present invention;
FIGURE 2 is an end elevational view of the truck of
This invention relates to railway truck snubbers and
FIGURE 1 with portions broken away and shown in
has for its primary object the provision of an improved
section to more clearly illustrate certain of its details of
snubber for snubbing relative movement of a pair of 10 construction;
relatively movable members of a railway truck.
FIGURE 3 is a fragmentary plan view of the truck of
Another object of the invention is to provide an im
FIGURE 1;
proved snubber for application between bolster and truck
FIGURE 4 is a longitudinal sectional view on an en
frame members of a locomotive traction truck whereby
larged scale of the embodiment of the snubber shown in
relative lateral motion of the member is snubbed and 15 the preceding ?gures;
such snubbing is unaffected by relative vertical motion of
FIGURE 5 is a vertical sectional view taken along the
the members.
lines 5—5 of FIGURE 4;
An additional object of the invention is to provide an
FIGURE 6 is a longitudinal sectional view on the
improved snubber for application between a bolster and
scale of FIGURE 4 of a second embodiment of the snub
Side frame of a locomotive traction truck wherein a fric
ber of the present invention;
tion surface ?xed to one of the bolster and truck frame
FIGURE 7 is a vertical sectional view taken along
members and friction shoe means movable with the other
member are in constant engagement for uniformly resist
the lines 7—7 of FIGURE 6; and
FIGURE 8 is a longitudinal sectional view on the
scale of FIGURES 4 and 6 of a third embodiment of
ing relative lateral motion of the bolster and truck frame.
A further object of the invention is to provide an im 25 the snubber of the present invention.
proved snubber for snubbing relative movement of a pair
Referring now in detail to the drawings, in which like
of relatively movable members of a railway truck where
reference characters designate like parts, the improved
in friction shoes, end-mounted on one of the members
snubber of the present invention, while applicable gen
and extending through and frictionally engaging a sleeve
erally for snubbing relative movement of a pair of mov
secured to the other member, are acted on radially and
able members in a direction substantially parallel to the
axially by pre-compressed resilient means, thereby en
axis of the snubber, is particularly designed for snub
abling the snubber to apply a predetermined resistance
bing the relative lateral movement of a bolster and truck
to relative movement of the members while automati'
frame of a locomotive traction truck. As illustrative of
cally compensating for wear.
the invention, a pair of the improved snubbers, each des
Another object of the invention is to provide an im
ignated as 1, have been applied to a locomotive traction
proved snubber for snubbing relative movement of a
truck 2 of a diesel-electric locomotive (not shown).
pair of relatively movable members of a railway truck
The illustrated truck 2 has a transom-type truck frame
wherein friction shoes, mounted between end brackets
or frame member 3, the sides 4 of which are integrally
secured to one of the side frame and bolster members
connected by longitudinally spaced transoms or cross
and extending through and frictionally engaging a sleeve 40 braces 5 and which is resiliently supported on the jour
secured to the other of said members, are held tight
nal boxes 6 by supporting spring groups 7 in turn sup
in their mountings by resilient means acting axially on
ported on equalizer bars 8 carried by the journal boxes
the shoes to take up any slack due to wear without af
fecting the resistance imposed by the snubber to lateral
motion.
A further object of the invention is to provide an im
proved snubber for snubbing relative movement of a
pair of relatively movable members of a railway truck
wherein a plurality of cylindrically surfaced friction shoes
are end-mounted between brackets secured to one of the
relatively movable members and slide in a cylindrical
sleeve or barrel secured to the other member with which
the shoes are constantly urged into frictional engagement
by radially acting spring means, the Shoes being held
tight in their mountings only by resilient means acting
axially thereon and the snubber imposing a frictional re
sistance to relative movement determined by its spring
means, whereby the snubber is enabled to exert the pre
determined resistance to relative movement of said mem
6. The bolster or bolster member 9 is of H-shape with
a leg 10 overlying each of the transoms 5 and a cross
piece 11 connecting the legs and carrying a center plate
12 on which rests the locomotive body (not shown).
The bolster 9 is resiliently supported on the frame 3 by
resilient means 13, here in the form of rubber pads, one
interposed between either end of each of the legs 10‘
and the underlying portions of the transom 5, the resili
ent means 13 being of such construction and so arranged
as to permit limited lateral motion or movement of the
bolster 9 relative to the truck 2.
The function of the snubbers 1 when applied to the
55 truck 2 is to snub the relative lateral movement of the
bolster 9 relative to the frame 3. To this end, each snub
ber is comprised of a sleeve, barrel or housing 14 prefer~
ably having a cylindrical bore 15 and secured to or made
rigid with one of the bolster and frame members, here to
bers in one direction, unaffected by wear and by relative 60 the midportion of one of the legs 10 of the bolster 9, by
movement in any other direction.
a mounting bracket 16 integral with or ?xed to the sleeve
Another object of the invention is to provide an im
14. Mounted with its axis substantially horizontally dis
proved snubber for snubbing the relative movement of
posed, the sleeve 14 slidably receives in its bore 15 and is
a pair of relatively movable members of a railway track
frictionaily engaged by friction means in the form of a
wherein friction shoes extending through and frictional
ly engaging a sleeve secured to one of the members and
end-mounted between spaced mountings secured to the
other member are yieldably connected to the mountings
so as to remain centered relative to the sleeve regard
less of the direction of relative movement of said mem
bers.
Other objects and advantages of the invention will
plurality of preferably cylindrically surfaced counterpart
friction shoes or elements 17. These shoes are urged into
frictional engagement with the inner annular or cylindri
cal friction face 18 of the sleeve 14 by a plurality of coil
or like springs 19 within and spaced axially or longitudi
70 nally of the shoes 17 and each preferably acting radially
or transversely on all of the shoes so as to equalize the
forces thereon.
3,024,742
3
In their preferred construction and arrangement, the
shoes 17 and radially acting springs 19 are similar to those
employed in the snubber disclosed in my Patent No.
2,710,750, issued June 14, 1955, with the minor excep
tion that the friction surfaces 20 of the shoes preferably
are formed on wear plates 21 a?ixed to the shoes and the
major exceptions that the friction means or shoes, to
gether or collectively, extend through the sleeve 14 se
cured to one of the bolster and frame members, are end
mounted on the other member, here the truck frame 3,
between or straddled by a pair of laterally spaced end
4
movement of the shoes 17 relative to the end brackets 22
by resilient means acting axially on the shoes and inter
posed between the shoes and one of the end brackets 22.
In this embodiment, the shoes 17 act at one end against
the confronting face or wall 23 of one of the end brackets
22 and at the other against a confronting face 31 carried
by the other of the end brackets 22 but formed on an end
disc or plate 32 having an integral outstanding substan
tially cylindrical stud 33 sliding in and extending through
an opening 34 of corresponding con?guration in the con
fronting wall of the associated of the end brackets, the
brackets 22 fixed or secured to the frame and are re
opening 34 preferably being reinforced at either side of
strained or held against axial movement relative to the
the wall 23 by an annular ?ange 35. Between the con
fronting faces of the end disc 32 and wall 23 of the end
bracket 22 is interposed resilient means, preferably in
the form of a rubber or like ring or pad 36, which is cen
tered or held in position by the instanding of the rein
forcing annular ?ange 35 and is of suf?cient thickness
normally to space the disc 32 from that ?ange. The de
end brackets by axially acting resilient means which auto
matically compensate for any slack or wear in the end
mounting.
The particular form of the pair of end
brackets 22 and the portion of the frame 3 on which it is
mounted will depend on the relation between the bolster
and the frame member in a particular truck, the objective
sired precompression of the rubber ring 36 readily is ob
being to have the ‘end brackets so positioned that their
tained by pin and slot means in the outer end portion of
confronting faces 23 will overlap the outer or opposite
the stud 33 being provided with a transverse slot 37 for
ends 24 of the shoes 17 in a direction normal to the axis
receiving, when the ring 36 is compressed to the desired
of the sleeve 14 and oppose or restrain movement of the
extent, a precompression pin, indicated at 38, which is
shoes relative to the frame 3 in a direction parallel to that
axis or axially of the shoes. The end brackets 22 thus 25 adapted to bear at either side of the stud against the
outer end of the outstanding of the annular flanges 35
may be angle irons attached in spaced pairs to the outer
and correspondingly limit inward movement of the disc
sides 25 of the transoms 5 as shown in FIGURES 1-3
32. Once the snubber of this embodiment is installed,
or, if more convenient and space allows, may be mounted
the pin 38 will be removed so as to release the rubber
on the upper face 26 of the truck frame 3, a type of
mounting for which the bracket of FIGURE 6 is well 30 ring 36 and enable the latter to act against the adjoining
adapted.
While in all of the illustrated embodiments, the snub
ber is adapted to snub relative lateral movement of the
end bracket 22 and axially upon the shoes 17 through
the interposed end disc 32.
Although effective in operation, the embodiments of
FIGURES 4 and 6 would have the objection, when ap
bolster 9 and frame 3 with a uniformly developed or urti
form force and the shoes 17 in each are adapted to ?oat 35 plied to passenger-carrying equipment, of metal-to-metal
contact between relatively movable members at the end
or move between their end brackets 22 so as to adjust
mountings, ‘with consequent noise or squeaking on relative
to relative movements, other than lateral, of the bolster
vertical movement of the bolster 9 and frame 3. Such
and frame without affecting lateral snubbing, the embodi
noise is readily avoided by use of the embodiment of the
ments of FIGURES 4 and 6 are exemplary of applica
tions in which the noise resulting from metal-to-metal 40 snubber shown in FIGURE 8. In the latter embodiment,
as in the second embodiment of FIGURE 6, only a single
contact between relatively movable parts in the end
set 27 of friction shoes 17 is employed and the shoes ex‘
mountings is of no consequence, while in that of FIG
ten-d through and frictionally engage the associated sleeve
URE 8, the end mountings are cushioned against noise and
14. However, unlike the shoes of the second embodi
thus well adapted for passenger car application.
ment, those of this third embodiment are cushioned at
Considering ?rst the embodiment of FIGURE 4, the
friction means there shown is comprised of opposed sets 45 both ends by resilient means acting both to space or sepa
rate relatively movable metal parts and, through precom
27 of a plurality and preferably three counterpart fric
pression, apply an axial force on the shoes to restrain
tion shoes 17 each, the sets extending from opposite ends
them against axial movement relative to the end brackets
into the sleeve 14 and being urged apart so as to hold
22 and take up any slack in the end mounting. The resili
their outer ends 24 against the confronting faces 23 of
the end brackets 22 by precompressed resilient or spring 50 ent means of this embodiment also perform the further
function of floatingly mounting the snubber so ‘as to per
means, here in the form of a coil spring 28, acting axially
mit shoes 17 to move with the sleeve 14 and relative to
on and interposed between the inner ends 29 of the shoes
the end ‘brackets 22 on relative movement of the bolster
17. So as to equalize the bearing of the spring 28 against
9 and frame 3 in other than a lateral direction.
the shoes 17, it is preferred that the spring react against
The above characteristics of the end mountings of the
the inner ends 29 of the shoes through a pair of spring 55
snnbber of the third embodiment are readily obtained by
caps 30 each at one end of the spring. Once the snubber
the use at each end of the friction shoes 17 of resilient
of this embodiment is in place, the outer ends 24 of its
means preferably in the form of a rubber or like ring or
shoes 17 will bear against the confronting faces 23 of the
pad 39, sandwiched between and spacing or separating a
end brackets 22 and rub or slide thereon to accommodate
any relative movement of the bolster 9 and frame 3 in a 60 pair of end discs or plates, the inner discs 40 of each
pair being attached or connected to and movable with the
direction substantially normal to or radial of the sleeve
friction shoes, while the outer disc 41 of each pair is at
tached or connected against movement to the adjacent of
against movement relative to the frame in a direction
the end brackets 22. With each set 27 of shoes 17 of
paralleling the axis of the sleeve 14 and, by reason of the 65 this and the other embodiments having a hollow interior
precompression of the spring, such restraint will continue
42 partly closed at one end ‘and open at the other end and
to be applied regardless of slack or wear in the end mount
there reinforced by radially projecting annular feet 43,
ing, thus enabling the shoes, through frictional engage
the desired connection of the inner and outer discs 40
ment with the sleeve, to provide uniform resistance to
and 41 to the shoes 17 and end brackets 22, respectively,
70
relative lateral movement of the bolster and frame.
conveniently is obtained by providing one of the discs of
The second embodiment of FIGURE 6 also has metal
each pair with a cup or socket 44 and the other with an
to-metal contact between relatively movable parts at the
axially extending stud 45, the socketed discs receiving or
end mountings but employs a single set 27 of friction
mating,
respectively, with an instanding boss 45 on one
shoes 17 which extend through the sleeve 14 and obtains
the desired yieldable or resilient restraint against axial 75 of the end brackets 22 and the partially closed of the ends
14 and shoes 17. At the same time, the shoes 17 will be
restrained or held by the interposed spring 28 substantially
3,024,742
24 of the shoes 17. The other or stud-bearing of the discs
40 and 41 are, respectively, received in or mated with the
hollow interior or central aperture 42 between the shoes
17 and an opening or socket 47 formed in the other of the
end brackets 22. If desired, the rings 39 may be posi
tioned or held in place by normally spaced positioning
bosses 48 instanding towards each other from the con
fronting faces of the discs sandwiching each ring.
6
said sleeve, spaced end brackets secured to said other
member and straddling said shoe means, and resilient
means interposed between each end of said shoe means
and the adjacent end of said brackets, said resilient means
restraining movement of said shoe means relative to said
brackets on relative movement of said members in a direc
tion substantially parallel to the axis of said sleeve and
being yieldable for movement of said shoe means with
While especially suited for a snubber having a single
said sleeve on relative movement of said members in an
set of friction shoes extending through its sleeve, such as 10 other direction.
that of the embodiment just described, a similar cushioned
5. In a railway truck having a pair of relatively mov
or resilient end mounting may be employed to adapt the
able members, the combination of an open-ended sleeve
opposed or plural shoe set snubber of FIGURE 4 to pas
senger car use. In ‘any event, the snubbers of both FIG
URE 4 and FIGURE 7 are designed to be installed as a
unit with their end brackets 22, so that, when installed,
their axially acting resilient means, respectively, the coil
spring 28 and the pair of rubber rings 36, will be pre
compressed to the desired extent.
This may be accom
secured to one of the members, ‘friction shoe means ex~
tending through and urged radially into engagement with
said sleeve, spaced end brackets secured to said other
member and straddling said shoe means, and a rubber
ring interposed between each end of said shoe means and
the adjacent of said brackets, said rubber rings restraining
movement of said shoe means relative to said brackets on
plished by inserting the snubbers between the end brackets 20 relative movement of said members in a direction substan
22 and temporarily clamping or bolting the end brackets
tially parallel to the axis of said sleeve and being yield
together with the force required to precompress the
able for movement of said shoe means with said sleeve on
resilient means, the clamps or bolts (not shown), used
relative movement of said members in another direction.
for this purpose, being removed after installation.
6. In a railway truck having a pair of relatively mov
From the above detailed description, it will be appar 25 able members, the combination of an open-ended sleeve
ent that there has been provided an improved snubber
secured to one of the members, a plurality of friction
which is effective in snubbing with uniform force relative
shoes extending through said sleeve, spring means acting
movement of a pair of relatively movable members of a
radially on said shoes for urging said shoes. into frictional
railway truck in a direction substantially axial of the
with said sleeve, end brackets secured to said
snubber, without being affected in its snubbing action by 30 engagement
other
member
and straddling outer ends of said shoes,
relative movement of the members in other directions. It
rubber means interposed between each of said ends and a
should be understood that the described and disclosed em
confronting wall of one of said brackets, and a pair of
bodiments are merely exemplary of the invention and that
discs sandwiching each of and connecting said rubber
all ‘modi?cations are intended to be included which do
not depart from either the spirit of the invention or the 35 means to said end brackets and shoes, said rubber means
acting axially of said sleeve on said shoes for restraining
scope of the appended claims.
movement thereof relative to said brackets in a direction
Having described the invention, what is claimed is:
substantially parallel to said sleeve and being yieldable
1. In a railway truck having a pair of relatively mova
for movement of said shoes in a direction substantially
ble members, the combination of an open-ended sleeve
secured ‘to one of the members, friction shoe means in and
urged radially into engagement with and projecting from
opposite ends of said sleeve, spaced end brackets secured
to said other member and straddling said shoe means, and
resilient means acting axially of said sleeve on said shoe
means for restraining movement thereof relative to said
end brackets on relative movement of said members sub 45
stantially axially of said sleeve.
2. In a railway truck having a pair of relatively mova
ble members, the combination of an open-ended sleeve
secured to one of the members, friction shoe means in and
urged radially into engagement with and projecting from
opposite ends of said sleeve, spaced end brackets secured
to said other member and straddling said shoe means, and
resilient means acting axially of said sleeve on said shoe
means for restraining movement thereof relative to said
normal to said sleeve.
7. In a railway truck having a pair of relatively mov
able members, the combination of an open-ended sleeve
secured to one of the members, a plurality of friction
shoes extending through and urged radially into frictional
engagement with said sleeve, a pair of end brackets se
cured to said other member and straddling outer ends of
said shoes, said shoes having end engagement with one of
said brackets, a disc carried by the other bracket and
engaging the confronting ends of said shoes, a stud inte
gral with and outstanding from said disc and extending
through an opening in the related bracket, rubber means
interposed between and normally spacing said disc and
related bracket, and pin and slot means for limiting in
ward movement of said disc relative to the related bracket
and precompressing said rubber means therebetween dur
end brackets on relative movement of said members SUl‘lJ~ 55 ing installation of said snubber, said rubber means on
release of said limiting means acting axially of said sleeve
on said shoes through said disc for restraining movement
of said shoes relative to said brackets in a direction axially
of said sleeve.
“direction.
8. In a railway truck having a pair of relatively mov
60
3. In a railway truck having a pair of relatively mova
able members, the combination of an open-ended sleeve
ible members, the combination of an open-ended sleeve
secured to one of the members, a plurailty of friction
secured to one of the members, friction shoe means ex
stantially axially of said sleeve, said shoe means being
movable with said sleeve means and relative to said brack
ets on relative movement of said members in another
tending through and urged radially into engagement with
and movable axially relative to said sleeve, spaced end
shoes extending through and urged radially into fric
tional engagement with said sleeve, a pair of end brackets
brackets secured to said other member and straddling said 65 secured to said other member and straddling outer ends of
said shoes, said shoes having end engagement with one of
shoe means, and resilient ‘means interposed between said
said brackets, a disc carried by the other bracket and en
shoe means and at least one of said brackets and acting
gaging the confronting ends of said shoes, a stud integral
axially of said sleeve on said shoe means for restraining
with and outstanding from said disc and extending
axial movement of said shoe means relative to said
70 through an opening in said other bracket, rubber means
brackets.
interposed between and normally spacing said disc and
4. In a railway truck having a pair of relatively mov
other bracket, said stud having a transverse slot in an
able members, the combination of an open-ended sleeve
outer portion thereof, and a pin receivable in said slot and
secured to one of the members, friction shoe means eX
straddling an outer end of said opening for limiting in
tending through and urged radially into engagement with 75 ward movement of said disc relative to the related bracket
3,024,742
ly on the shoes of each set for urging said shoes into frica
tional engagement with said sleeve, spaced end brackets
secured to said other member and each engaged by an
outer end of one of said sets, and resilient means inter
posed between and acting on inner ends of said sets for
urging said outer ends into said engagement with said
brackets and restraining movement of said shoes relative
to said brackets in a direction axially of said sleeve.
tionally engaging said sleeve, spaced end brackets secured
to said other member and each engaged by an outer end
of one of said sets, and resilient means interposed between
and acting on inner ends of said sets for urging said outer
ends into said engagement with said brackets and restrain
ing movement of said shoes relative to said brackets in a 15
direction axially of said sleeve.
10. In a railway truck having a pair of relatively mov
able members, the combination of an open~ended sleeve
secured to one of the members, a plurality of sets of fric
tion shoes extending from opposite ends into and fric
tionally engaging said sleeve, spaced end brackets secured
to the other member and each having a substantially ?at
face engaged by outer ends of shoes of one of said sets,
and a coil spring within said sleeve and interposed be
tween and acting oppositely on inner ends of said sets 25
for restraining movement of said shoes relative to said
end brackets in a direction axially of said sleeve.
11. In a railway truck having a pair of relatively mov
able members, the combination of an open-ended sleeve
secured to one of the members, a plurality of sets of fric
tion shoes extending from opposite ends into and fric~
8
tionally engaging said sleeve, resilient means acting radial
and compressing said rubber means therebetween during
installation, said rubber means on removal of said pin
acting axially of said sleeve on said shoes through said
disc for restraining movement of said shoes relative to
said brackets in a direction axially of said sleeve.
9. In a railway truck having a pair of relatively mov
able members, the combination of an open-ended sleeve
secured to open of the members, a plurality of sets of fric
tion shoes extending from opposite ends into and fric
30
References Cited in the ?le of this patent
UNITED STATES PATENTS
1,016,073
1,130,665
1,646,433
2,080,180
2,405,398
2,481,006
2,562,595
2,710,750
2,746,744
2,747,696
Kiesel _______________ __. Jan. 30,
Bullock _______________ __ Mar. 2,
Tomlinson ___________ __ Oct. 25,
Messier ______________ __ May 11,
Buckwalter ___________ __ Aug. 6,
Dath ________________ __ Sept. 6,
Blue _________________ __ July 31,
Blattner _____________ __ June 14,
Blattner _____________ __ May 22,
Blattner ______________ __ May 29,
1912
1915
1927
1937
1946
1949
1951
1955
1956
1956
FOREIGN PATENTS
465,995
Canada ______________ __ June 20, 1950
693,984
Great Britain __________ __ July 8, 1953
OTHER REFERENCES
“A Report to the Railroads of America,” by Chrysler
Corporation, December 15, 1950, page 9.
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